Route description[edit]
Starting in Inyo County, US 6 begins its route at Bishop at a junction with US 395 near the Bishop Paiute-Shoshone Indian Colony. After leaving Inyo County and entering Mono County, the highway proceeds due north to the town of Benton, and makes a junction with SR 120. The highway then begins ascending the lower foothills of the White Mountains, towards Montgomery Pass in Nevada. The highway reaches the state line before cresting the pass. While still in California, the highway passes Boundary Peak, the highest point in Nevada.[5]
US 6 is part of the California Freeway and Expressway System,[6] and is part of the National Highway System,[7] a network of highways that are considered essential to the country's economy, defense, and mobility by the Federal Highway Administration.[8] US 6 is eligible to be included in the State Scenic Highway System,[9] but it is not officially designated as a scenic highway by the California Department of Transportation.[10]

History[edit]
Historic Route 6 sign near the southern terminus of Sierra Hwy.
The California portion of US 6 was originally commissioned in 1937 as an extension of the highway from Greeley, Colorado as part of the historic Grand Army of the Republic Highway auto trail.[11]
Grand Army of the Republic Highway[edit]
US 6 was later extended further south through the Mojave Desert and Los Angeles to Long Beach in Southern California.[4] It traveled along with what is now US 395, SR 14 (Sierra Highway), I-5, I-110 / SR 110, and SR 1. When the Four Level Interchange was constructed, US 6 was the original number for SR 110 at this interchange.
It formerly ran from Long Beach west to San Pedro and continued north on Figueroa Street, briefly concurrent with US 66 in Los Angeles before turning northwest and co-signing with US 99 on San Fernando Road. US 66 continued north on the Pasadena Freeway before also being decommissioned in 1964, leading to the Harbor and Pasadena freeways being redesignated to SR 11, which ran from Gaffey Street in San Pedro to Colorado Boulevard in Pasadena. In 1981, the Harbor Freeway between Gaffey Street and Interstate 10 became Interstate 110, replacing the SR 11 designation. The northern segment of SR 11 continuing to Glenarm Street became SR 110, which continues briefly as the Harbor Freeway before becoming the Pasadena Freeway north of the Four Level Interchange with US 101.
Renumbering[edit]
In 1964, all of the route of US 6 in California south of Bishop lost official status with its US 6 signs removed. The highway was truncated to Bishop as part of a 1964 highway renumbering project.[12]

Major intersections[edit]
Except where prefixed with a letter, postmiles were measured on the road as it was in 1964, based on the alignment that existed at the time, and do not necessarily reflect current mileage. R reflects a realignment in the route since then, M indicates a second realignment, L refers an overlap due to a correction or change, and T indicates postmiles classified as temporary (for a full list of prefixes, see the list of postmile definitions).[2] Segments that remain unconstructed or have been relinquished to local control may be omitted. The numbers reset at county lines; the start and end postmiles in each county are given in the county column.
County
Location
Postmile
[2][13][14]
Destinations
Notes
Inyo
INY R0.00-8.35
Bishop
R0.00
US 395 – Los Angeles, Reno
South end of US 6; former US 6 south
Mono
MNO 0.00-32.29
Benton
25.72
SR 120 – Lee Vining, Yosemite National Park
​
27.30
Agricultural Inspection Station (southbound only)
​
32.29
US 6 – Tonopah
Continuation into Nevada
1.000 mi = 1.609 km; 1.000 km = 0.621 mi